https://www.esri.ie/system/files/publications/RS158_0.pdf
http://library.fes.de/pdf-files/bueros/budapest/15322-20190505.pdf
https://www.opendemocracy.net/uk/sunny-hundal/millionaire-is-planning-to-spend-around-700000-to-target-pro-remain-mps-at-election?utm_source=Daily+Ne